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EP2699045A1 - Stromregelungsverfahren, -vorrichtung und -system - Google Patents

Stromregelungsverfahren, -vorrichtung und -system Download PDF

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Publication number
EP2699045A1
EP2699045A1 EP12792358.9A EP12792358A EP2699045A1 EP 2699045 A1 EP2699045 A1 EP 2699045A1 EP 12792358 A EP12792358 A EP 12792358A EP 2699045 A1 EP2699045 A1 EP 2699045A1
Authority
EP
European Patent Office
Prior art keywords
power
communication system
interfering
transmit power
standard communication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12792358.9A
Other languages
English (en)
French (fr)
Other versions
EP2699045A4 (de
EP2699045B1 (de
Inventor
Kai Yang
Xiang Peng
Zhen Li
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of EP2699045A1 publication Critical patent/EP2699045A1/de
Publication of EP2699045A4 publication Critical patent/EP2699045A4/de
Application granted granted Critical
Publication of EP2699045B1 publication Critical patent/EP2699045B1/de
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/266—Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/40—TPC being performed in particular situations during macro-diversity or soft handoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a power control method, apparatus and system.
  • an existing 2nd generation (2nd Generation, 2G) communication network gradually evolves into a 3rd generation (3rd Generation, 3G) network and even to a 4G network.
  • 3rd Generation 3rd Generation
  • a 900 MHz spectrum of a global system for mobile communications Global System for Mobile communications, GSM
  • GSM Global System for Mobile communications
  • UMTS Universal Mobile Telecommunications System
  • the prior art proposes using a UMTS bandwidth lower than the standard spectrum bandwidth 5 MHz, for example, 4.2 MHz or 4.6 MHz, on the 900 MHz spectrum.
  • a protection bandwidth between frequencies of two different types of networks is insufficient.
  • signals of a first network for example, the GSM
  • a second network for example, the UMTS
  • the present invention provides a power control method and apparatus, which can reduce interference of signals of a first network to a second network.
  • the present invention provides a power control method, where the method includes: when a service runs in a first-standard communication system, determining a transmit power P1 of a base station of the first-standard communication system; determining that the transmit power P1 is higher than or equal to a threshold value P2 of power interference of the first-standard communication system to a second-standard communication system; on an interfering frequency of the first-standard communication system, using a power lower than P1 to send data, where the interfering frequency is a frequency that causes interference to the second-standard communication system among hopping frequencies used by the service.
  • the present invention further provides a power control apparatus, where the includes: a first determination module, configured to, when a service runs in a first-standard communication system, determine a transmit power P1 of a base station of the first-standard communication system; a second determination module, configured to determine that the transmit power P1 is higher than or equal to a threshold value P2 of power interference of the first-standard communication system to a second-standard communication system; and a first sending module, configured to use, at an interfering frequency of the first-standard communication system, a power lower than P1 to send data, where the interfering frequency is a frequency that causes interference to the second-standard communication system among hopping frequencies used by the service.
  • a first determination module configured to, when a service runs in a first-standard communication system, determine a transmit power P1 of a base station of the first-standard communication system
  • a second determination module configured to determine that the transmit power P1 is higher than or equal to a threshold value P2 of power interference of the first-standard communication system to a second
  • the present invention further provides a system, where the system includes the power control apparatus descried in the foregoing.
  • a signal transmit power of the interfering frequency of the first-standard communication system may be reduced when it is determined that the first-standard communication system will cause interference to the second-standard communication system, thereby reducing the interference of the first-standard communication system to the second-standard communication system.
  • GSM Global System for Mobile communications
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access Wireless
  • FDMA Frequency Division Multiple Addressing
  • OFDMA Orthogonal Frequency-Division Multiple Access
  • SC-FDMA single-carrier FDMA
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • the terminal may be a wireless terminal or a wired terminal.
  • the wireless terminal may refer to a providing a user with voice and/or data connectivity, a handheld apparatus having a wireless connection function, or another processing apparatus connected to a wireless modem.
  • the wireless terminal may communicate with one or multiple core networks through a radio access network (for example, RAN, Radio Access Network).
  • a radio access network for example, RAN, Radio Access Network
  • the wireless terminal may be a mobile terminal, for example, a mobile phone (or referred to as a cellular phone), or a computer with a mobile terminal, for example, a portable, pocket, handheld, computer-build-in, or vehicle-mounted mobile apparatus, which exchanges voices and/or data with the radio access network, for example, a personal communication service (PCS, Personal Communication Service) phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL, Wireless Local Loop) station, a personal digital assistant (PDA, Personal Digital Assistant).
  • PCS Personal Communication Service
  • SIP session initiation protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the wireless terminal may also be called a system, a subscriber unit (Subscriber Unit), a subscriber station (Subscriber Station), a mobile station (Mobile Station), a mobile (Mobile), a remote station (Remote Station), an access point (Access Point), a remote terminal (Remote Terminal), an access terminal (Access Terminal), a user terminal (User Terminal), a user agent (User Agent), a user apparatus (User Apparatus), or a user equipment (User Equipment).
  • the base station may refer to an apparatus that communicates with the wireless terminal through one or multiple sectors on an air interface in an access network.
  • the base station may be configured to perform conversion between a received air frame and an IP packet, acting as a router between the wireless terminal and the rest part of the access network, where the rest part of the access network may include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station may also coordinate attribute management on the air interface.
  • the base station may be a base transceiver station (BTS, Base Transceiver Station) in the GSM or CDMA, a NodeB (NodeB) in the WCDMA, or an evolved NodeB (NodeB or eNB or e-NodeB, evolutional Node B) in the LTE, which is not limited in the present invention.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • eNB evolved NodeB
  • e-NodeB evolutional Node B
  • the base station controller may be a base station controller (BSC, base station controller) in the GSM or CDMA, or a radio network controller (RNC, Radio Network Controller) in the WCDMA, which is not limited in the present invention.
  • BSC base station controller
  • RNC Radio Network Controller
  • system and “network” in this specification are generally interchangeable.
  • the wording "and/or” in this specification merely describes an association relationship between associated objects, indicating that three relationships may exist, for example, A and/or B may indicate three situations: only A exists, A and B exist at the same time, and only B exists.
  • the character "/" in this specification generally indicates that two associated objects are in an "or” relationship.
  • the embodiments of the present invention may be applicable to interference caused by coexisting of the GSM and UMTS systems or interference caused by coexisting of the GSM and LTE systems, or is applicable to interference caused between networks of the same standard.
  • the specific embodiments of the present invention are described by using only the coexisting of the GSM and UMTS systems as an example. It should be understood that the present invention is not limited to communication systems of these two standards and may also involve communication systems of any other two standards, for example, this solution is also applicable to a situation where the GSM and LTE systems coexist.
  • the present invention provides a power control method, apparatus, and system.
  • the embodiments provided by the present invention are described in detail below with reference to the accompanying drawings.
  • FIG.1 is a flow chart of a power control method according to an embodiment of the present invention.
  • a first-standard communication system coexists with a second-standard communication system, and a protection bandwidth between spectrum resources used by the first-standard communication system and the second-standard communication system is insufficient.
  • the network standard of the first-standard communication system is different from that of the second-standard communication system, for example, the first-standard communication system is a GSM system and the second-standard communication system is a UMTS system, or the first-standard communication system is a GSM system and the second-standard communication system is an LTE system, which does not affect implementation of this embodiment.
  • the power control method provided in this embodiment of the present invention includes the following steps.
  • a power control apparatus When the service runs in the first-standard communication system, for example, when a user equipment (User Equipment, UE for short) initiates a service in the first-standard communication system, or when the service is handed over to the first-standard communication system, determine the transmit power P1 of the first-standard communication system regarding the service. For example, a power control apparatus performs, according to a measurement report that is reported by a terminal and in combination with a corresponding power control algorithm, a power control decision is made to determine the transmit power of the base station.
  • UE User Equipment
  • a range of spectrums used by the first-standard communication system and the second-standard communication system may be preset by an operator. Therefore, a frequency that may cause interference may be determined according to the spectrum resources used by the two systems.
  • the threshold value P2 of interference of the first-standard communication system to the second-standard communication system may be determined according to link performance.
  • whether the transmit power P1 is higher than or equal to the threshold value P2 of interference of the first-standard communication system to the second-standard communication system may be judged first.
  • the judgment result is yes, it may be determined that the transmit power P1 is higher than or equal to the threshold value P2 of interference of the first-standard communication system to the second-standard communication system.
  • perform 103 When it is determined that the transmit power P1 is higher than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system, perform 103.
  • the transmit power P1 is lower than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system, perform 104.
  • the first-standard communication system may assign hopping frequencies for the service to use. These hopping frequencies form a set of hopping frequencies of the service. In the set of these hopping frequencies, a frequency that causes interference to the second-standard communication system is an interfering frequency. For example, it may be set that, in the set of hopping frequencies used by the service, a frequency with a spacing to a center frequency of the second-standard communication system is smaller than a preset value is an interfering frequency, or it may be considered that, in the set of hopping frequencies, a frequency that occupies the same spectrum resources as the second-standard communication system is an interfering frequency.
  • the transmit power P1 is higher than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system
  • the first-standard communication system uses a power lower than the transmit power P1 to send data on these interfering frequencies, where the transmit power P1 is obtained according to the measurement report (that is, parameters reflecting a wireless environment) reported by the terminal and the power control algorithm for the service to use.
  • reducing the transmit power of the interfering frequency may specifically be using the power of the threshold value P2 of interference to send data on the interfering frequency, or may be determining the transmit power of the interfering frequency according to a relationship between a performance loss caused by power reduction on the interfering frequency of the first-standard communication system and a performance gain of the second-standard communication system to achieve a balance between the performance loss of the first-standard communication system and the performance gain of the second-standard communication system, or may be determining the transmit power of the interfering frequency according to a power that can be compensated on a non-interfering frequency of the service to ensure performance of the service, or may be determining the transmit power of the interfering frequency from another standpoint, for example, ensuring QoS of the service, which is not limited in this embodiment of the present invention.
  • the transmit power P1 of the interfering frequency does not reach the interference value and therefore does not cause interference to the second-standard communication system, or the interference caused to the second-standard communication system is within a preset allowable range, or can be ignored.
  • the transmit power P1 is used to send data, where the transmit power P1 is obtained according to the measurement report reported by the terminal and the power control algorithm for the service to use. That is, P1 is used as the power to send data on both the interfering frequency and the non-interfering frequency.
  • a power lower than P1 is used to send data at the interfering frequency.
  • a signal transmit power of the interfering frequency of the first-standard communication system may be reduced when it is determined that the first-standard communication system will cause interference to the second-standard communication system, thereby reducing the interference of the first-standard communication system to the second-standard communication system.
  • FIG. 2 is a flow chart of a power control method according to another embodiment of the present invention.
  • a first-standard communication system is a GSM system and a second-standard communication system is a UMTS system is used as an example for detailed description.
  • the threshold value of interference of the first-standard communication system to the second-standard communication system the following factors may be considered: when the transmit power of the GSM system serving as the first-standard communication system is reduced to a certain value to reduce the interference to the UMTS system serving as the second-standard communication system, a performance gain of the UMTS system is maximized; and before the transmit power of the GSM system serving as the first-standard communication system is reduced to a certain value, the influence on the performance of the GSM system is not high, but after the transmit power of the GSM system is reduced to the value, if the transmit power of the GSM system continues to be reduced, the influence on the performance of the GSM system may significantly increases.
  • the threshold value P2 of interference the two factors may be comprehensively considered to maximize the overall performance gain of the GSM system and the UMTS system.
  • a carrier frequency bandwidth of a network is related to the specific network standard, for example, if the first-standard communication system is a GSM network, the carrier frequency bandwidth is 200 KHz, and if the second-standard communication system is a UMTS network, the bandwidth is 5 MHz. It should be understood that a frequency band occupied by the second-standard communication system may be planned by an operator. Therefore, the center frequency may be known in advance.
  • a transmit power adopted by the interfering frequency is determined according to the lost power on the interfering frequency and the compensated power on the non-interfering frequency. It should be understood that, according to provisions of a protocol, a system prescribes that each cell has a predetermined maximum transmit power, and when data is sent in the base station, the transmit power cannot exceeds the prescribed maximum transmit power.
  • the first-standard communication system may compensate the performance loss caused by the power reduction on the interfering frequency by using an interleaving gain and by increasing the power on the non-interfering frequency.
  • the transmit power on the non-interfering frequency when the transmit power on the interfering frequency is reduced, the transmit power on the non-interfering frequency needs to be increased to compensate the performance loss caused by the power reduction on the interfering frequency; as the maximum transmit power is limited, the transmit power on the non-interfering frequency may be increased to the maximum transmit power of a cell at most. That is, when the transmit power on the non-interfering frequency needs to be increased to compensate the loss, the maximum power that can be increased on each non-interfering frequency is a difference between the maximum transmit power of the cell and the determined transmit power P1. Therefore, when the number of interfering frequencies and the number of non-interfering frequencies are determined, the maximum lost power that can be compensated on the non-interfering frequency can be determined.
  • the transmit power of the interfering frequency is generally reduced to the interference threshold at lowest (when the transmit power of the interfering frequency is reduced to the interference threshold, continuing to reduce the power does not bring a significant gain for the second-standard communication system but brings a huge loss to the first-standard communication system). That is, the maximum magnitude of transmit power reduction on the interfering frequency is generally a difference between the determined transmit power P1 and the threshold value P2 of interference. Therefore, when the number of interfering frequencies and the number of non-interfering frequencies are determined, the maximum transmit power that may be lost on the interfering frequency can be determined.
  • the transmit power on the interfering frequency may be determined in the following manner: when the power on the interfering frequency is reduced to P2 and the power on the non-interfering frequency is increased to P max , the transmit power of the interfering frequency is used to send data, where the transmit power is determined according to the relationship between the lost power on the interfering frequency and the compensated power on the non-interfering frequency, and P max is the maximum transmit power of a cell of the first-standard communication system where the service is located.
  • the power that can be compensated on the non-interfering frequency is: (Maximum transmit power P max of the cell - Transmit power P1) x Number of non-interfering frequencies.
  • the power that can be reduced on the interfering frequency is: (Transmit power P1-Threshold value P2 of interference) x Number of interfering frequencies. Comparing the power that can be compensated on the non-interfering frequency and the power that can be reduced on the interfering frequency, when the power that can be compensated on the non-interfering frequency is higher than the power that needs to be reduced on the interfering frequency, the power of the interfering frequency may be reduced to the interference threshold.
  • the power of the threshold value P2 of interference may be used to send data.
  • a power higher than the transmit power P1 is used to send data.
  • the transmit power of the non-interfering frequency may be determined according to the transmit power on the interfering frequency for sending data.
  • the power lost on the interfering frequency is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies, and the offset of the compensated power required on the non-interfering frequency is P offset. Therefore, the power that needs to be increased on the non-interfering frequency is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies + Offset P offset of the compensated power.
  • a value of the power that needs to be increased on the non-interfering frequency and corresponds to a value of the power that is reduced on the interfering frequency may be obtained in advance on the basis that link performance can be compensated. That is, a corresponding relationship between the value of the power that is reduced on the interfering frequency and the value of the power that is increased on the non-interfering frequency is obtained.
  • the value of the power that needs to be compensated on the non-interfering frequency may be directly obtained according to the corresponding relationship. It should be understood that the relationship between the two values of power may be obtained in a manner in the prior art, for example, link performance emulation and statistics collection.
  • the power control apparatus of the first-standard communication system not only uses, on the interfering frequency, a power lower than the determined transmit power P1 to send data to the terminal, but also uses, on the non-interfering frequency, a power higher than the determined transmit power P1 to send data to the terminal. Therefore, the power loss brought to the terminal on the interfering frequency may be compensated, thereby ensuring normal communication of the terminal of the first network.
  • the first-standard communication system determines the transmit power of the non-interfering frequency according to the lost power on the interfering frequency, or determines the transmit power of the non-interfering frequency according to the reduced power on the interfering frequency and the increased power on the non-interfering frequency, so as to achieve a balance between reducing the interference to the second-standard communication system and satisfying the link performance of the service of the first-standard communication system.
  • a situation that a first-standard communication system is a GSM system and a second-standard communication system is a UMTS system is still used as an example for detailed description.
  • a transmit power P1 of a base station is determined.
  • P1 For the specific method, reference may be made to 101 in the embodiment corresponding to FIG. 1 .
  • the transmit power P1 is higher than or equal to a threshold value P2 of interference of the first-standard communication system to the second-standard communication system is determined.
  • a transmit power of an interfering frequency is used to send data, where the transmit power is determined according a relationship between a lost power on the interfering frequency and a power that can be compensated on a non-interfering frequency.
  • the transmit power of the interfering frequency is used to send data, where the transmit power is determined according to the relationship between the lost power on the interfering frequency and the power that can be compensated on the non-interfering frequency, and P max is the maximum transmit power of a cell of the first-standard communication system where the service is located.
  • the power that can be compensated on the non-interfering frequency and the power that can be reduced on the interfering frequency may be determined in the manner in the preceding embodiment.
  • the power that can be compensated on the non-interfering frequency is lower than the power that can be reduced on the non-interfering frequency
  • the power that can be compensated on the non-interfering frequency is lower than the lost power on the interfering frequency
  • performance of the service of the first-standard communication system cannot be ensured even when the power of the non-interfering frequency is increased to the maximum transmit power of the cell.
  • the power that can be compensated on the non-interfering frequency is lower than the power that can be reduced on the non-interfering frequency, it may be determined that the power of the non-interfering frequency is increased to the maximum transmit power of the cell, and a value of the power that can be reduced on the interfering frequency is determined according to a value of the maximum power that can be compensated on the non-interfering frequency.
  • this may be expressed by adopting a formula as follows: determine that (P max - P1) x n1 + P offset ⁇ (PI - P2) x n2, where n1 is the number of non-interfering frequencies, n2 is the number of interfering frequencies, P offset is an offset of the compensated power, P1 is the determined transmit power of the service, and P2 is the threshold value of interference of the first-standard communication system to the second-standard communication system. In this situation, on the non-interfering frequency, the power P max is used to send data.
  • the value of the power that is reduced on the interfering frequency may be directly determined according a corresponding relationship between the value of the compensated power on the non-interfering frequency and the value of the lost power on the interfering frequency and the link performance.
  • the power on the interfering frequency is reduced based on the determined transmit power P1 of the service.
  • a power control apparatus of the first-standard communication system not only uses, on the interfering frequency, a power lower than the determined transmit power P1 to send data to a terminal, but also uses, on the non-interfering frequency, a power higher than the determined transmit power P1 to send data to the terminal. Therefore, the power loss brought to the terminal on the interfering frequency may be compensated, thereby ensuring normal communication of the terminal of the first network.
  • the first-standard communication system determines the power that can be lost on the interfering frequency according to the power that can be compensated on the non-interfering frequency and further determines the transmit power of the interfering frequency, or determines the transmit power of the non-interfering frequency according to the reduced power on the interfering frequency and the increased power on the non-interfering frequency, so as to achieve a balance between reducing the interference to the second-standard communication system and satisfying the link performance of the service of the first-standard communication system.
  • FIG. 3 is a flow chart of a power control method according to still another embodiment of the present invention.
  • a first-standard communication system is a GSM network with a carrier frequency bandwidth of 200 kHz and a second-standard communication system is a UMTS network or a long term evolution (Long Term Evolution, LTE) system, for example, a carrier frequency bandwidth of the LTE system may be 3 MHz, 5 MHz, or 10 MHz, and a carrier frequency bandwidth of UMTS system is 5 MHz.
  • LTE Long Term Evolution
  • a situation that the second-standard communication system is the UMTS system is taken as an example for description.
  • a service is initiated in the GSM system, or is handed over to the GSM system, and the GSM system assigns corresponding hopping frequencies for the service.
  • the hooping frequencies assigned to the service are ⁇ 1, 3, 5, 7, 9, 10 ⁇ , corresponding frequencies are ⁇ 935.2, 935.6, 936, 936.4, 936.8, 937 ⁇ , the unit is MHz, and a center frequency of the UMTS network is 939.3 MHz.
  • a power control apparatus of the first-standard communication system receives a measurement report sent by the terminal where the service runs, where the downlink measurement report carries the strength and quality of an uplink signal received by the terminal to embody a wireless environment where the service is located.
  • the power control apparatus of the first-standard communication system determines, according to the measurement report, the transmit power P1 of a (cell) base station during service running.
  • the specific calculation method may adopt the prior art. For example, in this embodiment of the present invention, it is determined that the downlink transmit power P1 of the service is 14 W, and the maximum transmit power P max of a cell configured in the GSM network is 20 W.
  • the threshold power P2 of interference of the first-standard communication system to the second-standard communication system may be determined according to the prior art, for example, emulation.
  • the transmit power P1 and the threshold power P2 of interference are compared. The specific comparison may be performed in a manner in the prior art.
  • the transmit power P1 exceeds the threshold power P2 of interference, it is determined that the transmit power P1 exceeds the threshold power P2 of interference of the first-standard communication system to the second-standard communication system, and perform 304; when the transmit power P1 is lower than the threshold power P2 of interference, it is determined that the transmit power P1 is lower than the threshold power P2 of interference of the first-standard communication system to the second-standard communication system, and perform 310.
  • this step may also be judging whether the transmit power P1 exceeds the threshold power P2 of interference of the first-standard communication system to the second-standard communication system, which does not influence implementation of this embodiment of the present invention.
  • the UMTS system determines, according to parameters such as link performance and acceptable throughput, that the downlink threshold power P2 of interference of the second-standard communication system is 10 W.
  • the power control apparatus of the GSM system acquires an interfering frequency of the service.
  • the center frequency of the UMTS system is 939.3 MHz
  • the power that can be reduced on the interfering frequencies is: (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies.
  • the power that can be compensated on the non-interfering frequencies is: (Maximum transmit power P max of a cell - Transmit power P1) x Number n1 of non-interfering frequencies.
  • the offset of the compensated power is P offset .
  • this step may also be judging whether the sum of the power compensated on the non-interfering frequencies and the offset of the compensated power is higher than or equal to the power lost on the interfering frequencies when the power on the interfering frequencies is reduced to P2 and the power on the non-interfering frequencies is increased to P max , which is not limited in the present invention.
  • the power control apparatus of the GSM system controls the base station to use the power P2 to send downlink data of the service.
  • the transmit power on the non-interfering frequencies is increased.
  • the transmit power of the non-interfering frequency may be determined according to the transmit power on the interfering frequencies for sending data.
  • the power lost on the interfering frequencies is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies
  • the offset of the compensated power required on the non-interfering frequencies is P offset. Therefore, the power that needs to be increased on the non-interfering frequencies is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies + Offset P offset of the compensated power.
  • a result obtained through the calculation may be rounded up, for example, 16.75 W is rounded up to 17 W.
  • the result may also be rounded down to 16.
  • the power control apparatus of the GSM system controls the base station to use the power P max to send downlink data of the service.
  • the value of the power that is reduced on the interfering frequencies may be directly determined according a corresponding relationship between the value of the compensated power on the non-interfering frequencies and the value of the lost power on the interfering frequencies and the link performance.
  • the power on the interfering frequencies is reduced based on the determined transmit power P1 of the service.
  • the transmit power P1 does not exceed the threshold power P2 of interference of the first-standard communication system to the second-standard communication system, as no interference may be caused to the second-standard communication system, or caused interference is within a controllable range, the power P1 is used to send data on the interfering frequencies and the non-interfering frequencies of the service.
  • the power control apparatus of the first-standard communication system determines the transmit powers of the service on the interfering frequencies and non-interfering frequencies by judging whether the sum of the power that can be compensated on the non-interfering frequencies and the offset of the compensated power can compensate the power lost on the interfering frequencies. In this way, service performance of the first-standard communication system is ensured while the interference to the second-standard communication system is reduced.
  • FIG. 4 is a schematic structural diagram of a power control apparatus according to an embodiment of the present invention.
  • the power control apparatus in this embodiment of the present invention includes:
  • a first determination module 401 is configured to, when a service runs in a first-standard communication system, determine a transmit power P1 of a base station.
  • the service runs in the first-standard communication system, for example, when a user equipment (User Equipment, UE for short) initiates a service in the first-standard communication system, or when the service is handed over to the first-standard communication system, the first determination module determines the transmit power P1 of the base station regarding the service.
  • UE User Equipment
  • a second determination module 402 is configured to determine that the transmit power P1 is higher than or equal to a threshold value P2 of interference of the first-standard communication system to a second-standard communication system.
  • the second determination module may determine that the transmit power P1 is higher than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system by comparing the transmit power P1 with the threshold value P2 of interference, and when it is determined that the transmit power P1 is higher than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system, triggers a first determination module to perform operation.
  • the first sending module 403 is configured to use a power lower than P1 to send data on an interfering frequency, where the interfering frequency is a frequency that causes interference to the second-standard communication system among hopping frequencies used by the service.
  • the second determination module determines that the transmit power P1 is higher than the threshold value P2 of interference of the first-standard communication system to the second-standard communication system, it may be considered that using the power P1 that is higher than P2 to send data on an interfering frequency may cause interference to the second-standard communication system.
  • the first-standard communication system uses a power lower than the transmit power P1 to send data on these interfering frequencies, where the transmit power P1 is obtained according to a measurement report (that is, parameters reflecting a wireless environment) reported by a terminal and a power control algorithm for the service to use.
  • reducing, by the first sending module, the transmit power on the interfering frequency may specifically be using the power of the threshold value P2 of interference to send data on the interfering frequency, or may be determining the transmit power of the interfering frequency according to a relationship between a performance loss caused by power reduction on the interfering frequency of the first-standard communication system and a performance gain of the second-standard communication system to achieve a balance between the performance loss of the first-standard communication system and the performance gain of the second-standard communication system, or may be determining the transmit power of the interfering frequency according to a power that can be compensated on a non-interfering frequency of the service to ensure performance of the service, or may be determining the transmit power of the interfering frequency from another standpoint, for example, ensuring QoS of the service, which is not limited in this embodiment of the present invention.
  • this embodiment of the present invention may further include:
  • the first sending module uses a power lower than P1 to send data on the interfering frequency. In this way, the interference of the first-standard communication system to the second-standard communication system is reduced.
  • FIG. 5 is a schematic structural diagram of a power control apparatus according to another embodiment of the present invention.
  • the power control apparatus in this embodiment of the present invention includes: a first determination module 501, a second determination module 502, and a first sending module 503.
  • a first determination module 501 the power control apparatus in this embodiment of the present invention includes: a first determination module 501, a second determination module 502, and a first sending module 503.
  • the first sending module may be configured to use a power of a threshold value P2 of interference to send data on an interfering frequency.
  • the first sending module may also be configured to, when a power on the interfering frequency is reduced to P2 and a power on a non-interfering frequency is increased to Pmax, use a transmit power of the interfering frequency to send data, where the transmit power is determined according to a relationship between a lost power on the interfering frequency and a compensated power on the non-interfering frequency, and Pmax is the maximum transmit power of a cell of a first-standard communication system where a service is located.
  • the first sending module may include:
  • the power lost on the interfering frequency is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies, and an offset of the compensated power required on the non-interfering frequency is P offset. Therefore, the power that needs to be increased on the non-interfering frequency is (Transmit power P1 - Threshold value P2 of interference) x Number n2 of interfering frequencies + Offset P offset of the compensated power.
  • FIG. 6 is a schematic structural diagram of a power control apparatus according to still another embodiment of the present invention.
  • the power control apparatus in this embodiment of the present invention includes: a first determination module 601, a second determination module 602, and a first sending module 603.
  • a first determination module 601 the power control apparatus in this embodiment of the present invention includes: a first determination module 601, a second determination module 602, and a first sending module 603.
  • the first sending module may include:
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiment described above is merely exemplary.
  • the division of units is merely a division of logical functions and another division mode may be used in actual implementation.
  • multiple units or components may be combined or integrated into another system or some features may be ignored or not executed.
  • the illustrated or described coupling, direct coupling, or communicative connections may be accomplished through some interfaces, and indirect coupling or communicative connections between apparatuses or units may be in electrical or mechanical form, or another form.
  • Units described as separate components may be or may not be physically separate, and parts displayed as units may be or may not be physical units, that is, the parts may be located at a position or distributed on multiple network units. A part of or all of the units may be selected as required to achieve the objectives of the solutions of the embodiments.
  • all function units in embodiments of the present invention may be integrated in a processing unit, or each unit may independently and physically exists, or two or more than two function units may be integrated into a unit.
  • the integrated unit may be not only implemented by adopting the form of hardware, but also implemented by adopting the form of a software functional unit.
  • the integrated unit When being implemented in the form of a software functional unit and being sold or used as an independent product, the integrated unit may be stored in a computer readable storage medium.
  • the technical solutions of the present invention may be essentially or the part contributing to the prior art or all or a part of the technical solutions may be embodied in the form of a software product.
  • the computer software product may be stored in a storage medium, including several instructions used to enable a computer apparatus (for example, a personal computer, a server, or a network apparatus) to implement all or a part of steps of a method in each embodiment of the present invention.
  • the storage medium includes any medium that is capable of storing program codes, for example, a U disk, a portable hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or a CD-ROM.
  • ROM read-only memory
  • RAM Random Access Memory
  • magnetic disk or a CD-ROM.

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EP2699045A4 (de) 2014-03-26
CN102196542B (zh) 2014-06-25
US20130111235A1 (en) 2013-05-02
US9237576B2 (en) 2016-01-12
US8694047B2 (en) 2014-04-08
EP2699045B1 (de) 2018-06-06
CN102196542A (zh) 2011-09-21
US20140162674A1 (en) 2014-06-12
WO2012163185A1 (zh) 2012-12-06
AU2012265470A1 (en) 2013-12-19
AU2012265470B2 (en) 2015-10-29

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